Sharp AQUOS LC-42D64U, Service Manual

Page: 47 / 172

LC-42/46/52D64U
6 – 5
No video (4)
No video at UHF/VHF broadcast signal reception No video at digital broadcast signal reception
Is the specified TV signal selected on the input select menu screen?
Is there the analog video signal output (VIDEO) at pin(13) of
tuner(TU1101)? Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and
(20) of tuner(TU1101)?
YES
NO
YES
NO
Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.). Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.).
Is there the analog video signal input (TUN_CVBS) at pin(40) of
IC501(AV_SW)? Are there the video signal outputs at pins(70) and (72) of connec-
tor(SC501) on the TERMINAL unit?
YES
NO
YES
NO
Check the line between pin(13) of
TU1101 and pin(40) of
IC501(AV_SW). Check the line between TU1101
and SC501.
Is there the analog video signal output at pin(30) of IC501? Are there the video signal inputs at pins(70) and (72) of connec-
tor(SC2203) on the MAIN unit?
YES
NO
YES
NO
Check IC501 and its peripheral
circuits. Check the line between SC2203
and SC501 connectors.
Is there the analog video signal output at pin(59) of connector(SC501)
on the TERMINAL unit? Are there the video signal inputs at pin(AM33) and (AM34) of
IC8001(CPU)?
YES
NO
YES
NO
Check the line between IC501
and SC501(Q501 and Q502,
etc.). Check the line between IC8001
and SC2203 (L2204, C2229,
etc.).
Is there the analog video signal input at pin(59) of connector(SC2203)
on the MAIN unit?
YES
NO
Check the line between SC2203
and SC501 connectors.
Is there the analog video signal input at pin(AM19) of IC8001(CPU)?
YES
NO
Check the line between IC8001
and SC2203 (Q2214, etc.).
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
LVDS_TX_0_DATA0_P/N(C7/B7), LVDS_TX_0_DATA1_P/N(E7/D7), LVDS_TX_0_DATA2_P/N(C6/B6), LVDS_TX_0_DATA3_P/N(C5/B5),
LVDS_TX_0_DATA4_P/N(E5/D5), LVDS_TX_0_CLK_P/N(E6/D6),
LVDS_TX_1_DATA0_P/N(B4/A4), LVDS_TX_1_DATA1_P/N(E4/D4), LVDS_TX_1_DATA2_P/N(B3/A3), LVDS_TX_1_DATA3_P/N(B1/B2),
LVDS_TX_1_DATA4_P/N(F5/F6), LVDS_TX_1_CLK_P/N(C2/C3),
YES
NO
Check IC8001 and its peripheral
circuits.(IC8151 thru IC8154, etc.)
Check the panel module.